.cont {
  width: 100%;
  height: 100%;
  background-position: center;
  background-size: 500px;
  background-repeat: no-repeat;
  background-color: #ffffff;
  background-image: url(../../assets/img/404.png);
  overflow: hidden;
}

.btn {
  position: absolute;
  left: 50%;
  top: 200px;
  margin-left: 46px;
}